Portable play surface device



FIG. 1 is a view in perspective of a portable play surface device showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front plant view thereof;

FIG. 4 is a side plan view thereof;

FIG. 5 is a back plan view thereof; and

FIG. 6 is a bottom plan view thereof.

The broken lines suggesting toy blocks shown in FIGS. 1 and 2 are for purposes of illustration only. 

The ornamental design for a portable play surface device, as shown and described. 